Softwr

Cloud · head to head

Heroku vs Kustomize

Heroku logo

Heroku

Cloud

Cloud Application Platform

From
$5/month
Rated
-
Full reviewWebsite
Kustomize logo

Kustomize

Cloud

Template-free customisation of Kubernetes YAML

From
Free
Rated
-
Full reviewWebsite

The short version

  • Only Kustomize has a free tier, so it costs nothing to try first.
  • Each has a real cost: Heroku there is no free dyno tier; the cheapest Eco dyno is $5 per month; Kustomize no packaging or distribution story, which is exactly what Helm charts provide
  • They diverge on capability: Heroku covers Git-based deployment, Kustomize covers Overlay patching.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which Heroku and Kustomize actually diverge.

Attributes where Heroku and Kustomize differ
AttributeHerokuKustomize
Starting price$5/monthFree
Pricing modelsubscriptionOpen source, no licence fee
Free tierNoYes
PlatformsWeb, Api, WorkersKubernetes, Linux, macOS, Windows
Founded2007Unknown

Identical on both: user rating (Not yet rated), category (Cloud).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in Heroku

  • Git-based deployment
  • Buildpacks
  • Dynos (containers)
  • Add-ons marketplace
  • Postgres database
  • Environment variables
  • Logging
  • API

Only in Kustomize

  • Overlay patching
  • No templating language
  • Built into kubectl
  • Generators

What people use each for

The jobs each tool is most often brought in to do.

Heroku

  • Application hostingnot Kustomize
  • Database as a servicenot Kustomize
  • CI/CD pipelinesnot Kustomize
  • API deploymentnot Kustomize

Kustomize

  • Managing dev, staging and production variants of the same manifestsnot Heroku
  • Keeping manifests readable and directly applyable rather than templatednot Heroku
  • Patching third-party manifests without forking themnot Heroku

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

Heroku

  • There is no free dyno tier; the cheapest Eco dyno is $5 per month
  • Eco dynos sleep after 30 minutes of inactivity, are restricted to personal accounts and allow only 2 process types
  • Free SSL and 10 process types start at the Basic dyno at $7 per month
  • Private and Shield dyno types require a Private Space, which is billed on top of the dynos
  • Private Space dynos start at $250 per month for Private-M and $500 per month for Private-L
  • Dyno prices are per dyno per month, so an app with several process types multiplies the bill

Kustomize

  • No packaging or distribution story, which is exactly what Helm charts provide
  • Deeply nested overlays become hard to follow, and reasoning about the final output requires building it
  • No release lifecycle: nothing tracks what is installed or supports rollback the way Helm does
  • Patch syntax is fiddly for anything beyond simple field replacement

Pricing, plan by plan

Heroku

$5/month
  • Eco Dyno$5/month
    • 0.5 GB RAM
    • Git/Docker deploy
    • Custom domains
  • Basic Dyno$7/month
    • 0.5 GB RAM
    • Always-on
    • Free SSL
  • Standard-1X Dyno$25/month
    • 0.5 GB RAM
    • Horizontal scaling
    • App metrics
  • Standard-2X Dyno$50/month
    • 1 GB RAM
    • Horizontal scaling
    • App metrics

Kustomize

Free
  • KustomizeFree
    • Full functionality
    • No usage limits
    • Community support

Which should you pick?

Choose Heroku if

  • You need git-based deployment.
  • You work on Web, Api, Workers.
  • You also want buildpacks.
Heroku review

Choose Kustomize if

  • You need overlay patching.
  • You want to start without paying.
  • You work on Kubernetes, Linux, macOS, Windows.
  • You also want no templating language.
Kustomize review

Questions people ask

Is Heroku or Kustomize better?
Neither clearly leads. Heroku starts at $5/month and Kustomize at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Heroku or Kustomize?
Kustomize has a free tier; the other does not. Paid plans start at $5/month for Heroku and Free for Kustomize.
Does Heroku or Kustomize run on more platforms?
Heroku runs on Web, Api, Workers. Kustomize runs on Kubernetes, Linux, macOS, Windows.
Can I use Kustomize for free?
Yes. Kustomize has a free tier, so you can try it without paying. Heroku starts at $5/month.
What is Heroku best used for?
Heroku is most often used for application hosting, database as a service, ci/cd pipelines, api deployment. Of those, application hosting and database as a service are not what Kustomize is typically brought in for.
What can Heroku do that Kustomize cannot?
Heroku covers Git-based deployment, Buildpacks, Dynos (containers), Add-ons marketplace. Kustomize covers Overlay patching, No templating language, Built into kubectl, Generators.

Answered from the vendors’ own pages

Heroku: How much does Heroku cost?

Heroku dyno pricing starts at $5 per month USD for the Eco tier (with 30-minute inactivity sleep), $7 per month for Basic (always-on), and scales up to $1,500 per month for Performance-2XL with 126 GB RAM.

Source
Kustomize: Is Kustomize free?

Yes, open source and part of the Kubernetes project.

Heroku: What is the cheapest always-on Heroku plan?

The Basic Dyno at $7 per month USD is Heroku's cheapest always-on container option. It provides 0.5 GB RAM, free SSL, and support for 10 process types.

Source
Kustomize: Kustomize or Helm?

Kustomize patches plain YAML and keeps bases readable; Helm templates and packages applications with a release lifecycle. Many teams use both — Helm to install third-party charts, Kustomize to patch them.

Heroku: How is Heroku Postgres priced?

Heroku Postgres Essential tier (shared resources) starts at $5-$20 per month for 1-32 GB disk. Standard tier (dedicated) ranges $50-$12,000 per month. Premium, Private, Shield, and Advanced tiers offer higher performance at corresponding prices.

Source
Kustomize: Do I need to install Kustomize?

No. It is built into kubectl, available through kubectl apply -k.

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